Biliary Tract Neoplasms Immunotherapy

An investigation into the survival outcomes, progression-free survival, and safety of triple therapy with Trastuzumab Rezetecan, Adebrelimab, and Lenvatinib in patients with advanced HER2-positive/low-expressing biliary tract cancer after the failure of at least two prior systemic therapies.

This study is designed as a prospective, randomized, open-label, phase II clinical trial to systematically evaluate the efficacy and safety of durvalumab combined with GEMOX/GC chemotherapy followed by lenvatinib, compared with capecitabine monotherapy, as adjuvant therapy for biliary tract cancer (BTC) after curative-intent resection.The primary objective is to determine whether the combination regimen can significantly improve the 1-year recurrence-free survival (RFS) rate. Secondary objectives include assessment of overall survival (OS) and the incidence of treatment-related adverse events. The overall aim is to identify a more effective and safer treatment strategy for postoperative adjuvant therapy in BTC.

This phase II study evaluates the efficacy and safety of Trastuzumab Rezetecan in combination with Adebrelimab and Lenvatinib as first-line therapy for patients with locally advanced or metastatic HER2-positive or HER2-low biliary tract cancer. The primary objective is the objective response rate (ORR). Key secondary objectives include efficacy endpoints-progression-free survival (PFS), overall survival (OS), disease control rate (DCR), and duration of response (DoR)-and safety assessments comprising adverse events (AEs), serious adverse events (SAEs), vital signs, and laboratory findings.

Explore the impact of the first-line application of Pembrolizumab with or without Lenvatinib or chemotherapy, on the survival, disease progression, and drug safety of patients with advanced biliary tract cancers